To ask the Scottish Executive, with regard to the work of the Scottish Environment Protection Agency's Dounreay Particles Advisory Group, (a) where samples of suspected irradiated particles removed from Dounreay beach are sent for analysis, (b) how many samples have been analysed since directions were issued, (c) how many samples are currently awaiting analysis, (d) how many samples to date have contained irradiated particles and at what level, (e) how any irradiated particles will be disposed of, (f) what the anticipated costs of analysis and final disposal are to the Scottish Executive and SEPA and (g) whether any of these costs will be recovered from other sources.